Abstract

Low‐energy satellite bands accompanying the C 1s mainline have been investigated both for randomly‐oriented and fixed‐in‐space CO2 molecules. We find that these satellite bands are resonantly enhanced at the same photon energy as the shape resonance of the mainline and more enhanced for the Σ‐symmetry parallel transition than the Π‐symmetry perpendicular transition. Our observations contradict the predictions based on the shake‐up model and agree with predictions given by the photoelectron‐impact model which assumes the dominance of final state correlations arising from the interaction between a primary photoelectron and a valence electron.